Switch



L. KELLNER Oct. 29, 1929.

SWITCH 2 Sheets-Sheet 2 Filed Oct. 1925 f loaz Patented Oct. 29, 1929UNITED STATES PATENT OFFICE LOUIS KELLNER, OF CHICAGO, ILLINOIS,ASSIGNOR T JEFFERSON ELECTRIC COM- IPANY, OF CHICAGO, ILLINOIS, ACORPORATION OF ILLINOIS SWITCH Application filed October 2, 1925. SerialNo. 59,990.

The invention relates to improvements in ence to switches of the typedisclosed in my copending application, Serial No. 42,125 filed July 8,1925, Patent #1,654,145 issued October 11,1927.

The primary object of the present invention is to provide a novel switchof the above type which is a double pole switch, and which is small andcompact in size, simple and inex pensive in construction, and eflicientand cer tain in operation.

Ancillary objects and advantages will become apparent from the followingdescription taken in connection with the accompanying drawings in which:

Figure 1 is a front view of a switch embodying the features of myinvention.

Fig. 2 is a sectional View taken along line 2-2 of Fig. 1, and showingthe contacts in closed position.

Fig. 3 is a fragmentary sectional view similar to Fig. 2, and showingthe contacts in open position.

Fig. 4 is a sectional view taken along line 44 of Fig. 1.

Fig. 5 is a sectional view taken along line 55 of Fig. 1.

Fig. 6 is a perspective view of the fixed contacts.

Fig. 7 is a fragmentary sectional view of a detail of construction.

Fig. 8 is a perspective view of the supporting standard for theoperating mechanism, and of one of the kick-off levers.

While the invention is susceptible of various modifications andalternative constructions, I have shown in the drawings and willdescribe in detail the preferred embodiment, but it is to be understoodthat I do not thereby intend to limit the invention to the specific formdisclosed, but aim to cover all modifications and alternativeconstructions falling within the spirit and scope of the invention asexpressed in the appended claims.

Referring to the drawings, the switch comprises a hollow base 8 of anysuitable insulating material, such as porcelain, to the opposite ends ofwhich supporting arms 9 are secured by screws 10. The interior of thebase constitutes a switch chamber 11 which is open at the front. Twosets of fixed contacts 12 and 13 are mounted in opposite ends of thebase, and are arranged to provide a double pole switch. The contacts 12preferably are clip contacts positioned next to the rear wall of thebase 8 and opening upwardly, and are formed on the inner ends of twolong metallic arms 14. The outer ends of these arms are bent to fit intonotches 15 in opposite sides of the base, and are secured therein byscrews 16. The contacts 13 also are clip contacts, and are spaced fromthe rear wall of the base and positioned in advance of the contacts 12.The contacts 13 are formed by folding the inner ends of two short arms17 the outer ends of which are bent to, fit into notches 18 in the sidesof the base in which they are secured by screws 19. Terminals 20 havingbinding screws 21 are connected to the contacts 12 and 13 by the screws16 and 19 respectively.

Mounted in the base 8 is a switch operating mechanism which comprises asupporting standard 22 resting at its opposite ends in notches 23 formedin the end walls of the base. To secure the standard 22 in position, itis formed at its opposite ends with two lugs 24; extending laterallyfrom opposite sides thereof, and engaging screws 25 extending throughthe rear. wall of the base.

Pivotally mounted on a pin 26 in the stan dard 22 is an outwardlyextending operating lever 27 provided with a handle 28. The

0 crating lever 27 consists of a metal strip W hich is bent double, andthe legs of which fit against opposite sides of the standard 22. Aninwardly extending U-shaped lever 29 is mounted on the pin 26 and fitsagainst the opposite sides of the lever 27. Struck out from oppositesides of the levers 27 and 29 are two pairs of lugs 30 and 31 connectedby coil springs 32. The lugs 30 and 31 are located at opposite sides ofthe pivot pin 26,

. and therefore serve to carry the springs 32 across the pin, whichconstitutes a dead center, as the lever 27 is moved from one positioninto the other.

To prevent the lever 29 from sticking, a pair of kick-0E levers 33 isprovided. These levers (see Fig. 3) are loosely mounted in the standard22 at opposite sides of the pivot pin 26. In the present instance, eachlever 33 is slotted as indicated at 46, and the standard is formed withdownwardly opening slots 47. The levers 33 are pivotally mounted in theslots 47 with the inner ends of the slots 46 and 47 in bearingengagement. Each lever 33 consists of acentral inclined lug 34positioned to be engaged by heels 35 on the inner ends of the legs ofthe lever 27, and of side lugs 36 extending laterally at opposite sidesof the standard 22 to engage the legs of the lever 29. When the handle28 is actuated to open or close the switch, the heels 35, atsubstantially the end of the movement of the lever 27 and after thesprings 32 are positioned substantially across the ends of the pin 26,will engage the proper lug 34, thereby pivoting the lever 33 to move thelugs 36 against the lever 29. This institutes the movement of the lever29 which movement is completed by the springs 32.

Mounted centrally in the rear of the base and at opposite sides of thestandard 22 are.

two laterally spaced standards 37 secured in position by screws 38. Eachstandard is formed with a pivot bearing 39. Pivotally mounted on thebearings are two contact members or blades 40 and 41. Each contactmember is adapted to be moved into and out of engagement respectivelywith the clip contacts 12 and 13 in one side of the base, and is formedwith a forwardly extending arm 42 carrying a pin 43 which extends into alongi tudinalzslot 44 in one arm of the lever 29. The 43 is insulatedfrom the arm 42 by an insulating bushing 45 (see Fig. 7).

To move the switch parts into closed position as shown in Fig. 2, oropen position as shown in'Fig. 3, the handle 28 is actuated therebyelongatingthe springs 32 and moving them directly over the dead center.The heels 35 of the lever 27 engage the lug 34 of the proper knick-ofli'lever 33, and thereby move the lugs 36 against the lever 29 to institutethe movement of the latter. Thereby the springs 32 are moved across thedead center, and act to complete the movement of the lever 29. In themovement of the lever 29 from one position to the other, the contactmembers 40 and 41 are oscillated into or out of engagement with thecontacts 12 and 13.

It will be evident that I have provided a simple and inexpensive doublepole switch which is compact and small in size, and which is positiveand certain in operation.

Iclaim as my invention:

+1; A switch having, in combination, a supporting standard, a pluralityof fixed contacts' constituting the contacts of a double pole switch, apivot on said standard, a pair of levers mounted on said pivot one leverextending outwardly and the other lever extending inwardly, spring meansconnecting said levers at points on opposite sides of said pivot, saidspring means upon actuation of said outwardly extending lever serving toshift said inwardly extending lever past the dead center, a pair ofkick-01f levers mounted in said standard, said kick-01f levers beingpositioned for selective engagement by said outwardly extending leverand being operable upon such engagement to institute the movement ofsaid inwardly extending lever, and a pair of contact blades pivotallymounted in said base for movement into and out of engagement with saidfixed contacts, said blades being connected to said inwardly extendinglever for movement thereby.

2. A switch having, in combination, a base, a plurality of fixedcontacts mounted in said base, said contacts being arranged to provide adouble pole switch, a pair of standards mounted in said base, a pair ofcontact blades pivotally mounted intermediate their ends on saidstandards for movement of their opposite ends into and out of engagementwith said double pole contacts, each blade having a central laterallyextending arm, a central standard mounted in said base, a leverpivotally mounted on said central standard and having a direct lostmotion connection with each of said blades, and means for actuating saidlever.

3. A switch having, in combination, a base, two sets of fixed contactsmounted in said base; apair of standards mounted in said base, a pair ofcontact blades pivotally mounted on said standards for movement into andout of engagement with said contacts, a central standard mounted in saidbase, a lever pivotally mounted on said standard and having a lostmotion connection with each of said contact blades, an actuating levermounted on said last mentioned standard, and spring means connectingsaid levers at points on oppositesides of their pivots,

said spring means bein'g adapted to shift said first mentioned lever'upon movement past dead center by said last mentioned lever.

4. A switch having, in combination, a base,

a plurality of sets of fixed contacts mounted in sald base, a pair ofstandards in opposite sides of said base and between said sets ofcontacts, a single supporting standard mounted in said base between saidfirst mentioned standards, contact blades mounted intermediate theirends on said first mentioned standards for movement into and out ofengagement with said fixed contacts, a lever mounted on said lastmentioned standard and having a toggle connection with said contactblades, spring means tending to hold said connection in one position,and means for actuating said lever to move said toggle through deadcenter into the other position.

In testimony whereof, I have hereunto alfixed my signature.

LOUIS KELLNER.

